<form id="loginform" action="http://ec.ahlon.me/back-end/auth.php" method="post" onsubmit="return submitForm();">
    <span class="txt">用户：</span>
    <span class="ipt"><input type="text" id="loginname" name="loginname" value=""/></span>
    <span class="txt">密码：</span>
    <span class="ipt"><input type="password" id="password" name="password" value="" /></span>
    <span class="btn"><input type="submit" value="登录" /></span>
</form>